(b) (i) Mixtures of molten salts often result in high excess mixing enthalpies. Calorimetric experiments of a 25:75 mixture of NaCl and KCl revealed an enthalpy of mixing ΔmixH of -0.4095 kJ mol-1 . Calculate β for this mixture. (ii) Aluminium boils at 2737 K
(b) (i) Mixtures of molten salts often result in high excess mixing enthalpies. Calorimetric experiments of a 25:75 mixture of NaCl and KCl revealed an enthalpy of mixing ΔmixH of -0.4095 kJ mol-1 . Calculate β for this mixture. (ii) Aluminium boils at 2737 K
Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter7: Chemical Energy
Section: Chapter Questions
Problem 62E: In a coffee-cup calorimeter, 1.60 g NH4NO3 is mixed with 75.0 g water at an initial temperature of...
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(b) (i) Mixtures of molten salts often result in high excess mixing enthalpies. Calorimetric experiments of a 25:75 mixture of NaCl and KCl revealed an enthalpy of mixing ΔmixH of -0.4095 kJ mol-1 . Calculate β for this mixture.
(ii) Aluminium boils at 2737 K at 100.0 kPa pressure. Given that at 100.0 kPa the molar heat capacity (Cp) of liquid aluminium is 29.30 J K-1 mol-1 , and of aluminium gas is 20.79 J K-1 mol-1 , calculate the total entropy change for the reaction: Al(liquid, 2000 K) → Al (gas, 3500 K). ΔvapS = 49.24 J K-1 mol-1
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